Incorrect Debit Order Dates.

I called African Bank from their Campus Square Branch, to advise them that if the 20th is on the 20th whether its a weekend or Public holiday i get paid on the 20th exactly. If African Bank doesn't debit on those days. I begged to not be debited before the 20th i would prefer after the 20th..this morning woke up to an sms from African Bank stating i should ensure sufficient funds are available.DO NOT DEBIT BEFORE THE 20th....PLEASE..<br> reference number:***.and still waiting for confirmation of my last request for date changes.